var Chrome = require('chrome-remote-interface')

Chrome({
    chooseTab: function(tabs) {
        var idx = 0
        tabs.forEach(function(tab, i) {
            if (tab.url === 'http://localhost:9966/')
                idx = i
        })
        return idx
    }
}, function(chrome) {
    chrome.on('Debugger.scriptParsed', function(params) {
        if (params.url.indexOf('http://') > -1) {
            //will print ID of index.js e.g. 36
            console.log("got script ID", params.scriptId)

            //now to change index.js to something else
            var r = Math.floor(Math.random() * 255)
            chrome.Debugger.setScriptSource({
                scriptId: params.scriptId,
                scriptSource: 'function foo(){ document.body.style.background = "hsl(' + r + ',50%,50%)"; }\n\nfoo(); setInterval(foo, 1000);'
            }, function(err, msg) {
                if (err)
                    console.log("Err with setScriptSource", params.scriptId, msg.message)
                else 
                    console.log("setScriptSource win:", msg);


                //getScriptSource always seems to work fine
                chrome.Debugger.getScriptSource({
                    scriptId: params.scriptId
                }, function(err, msg) {
                    if (err)
                        console.log("Err with getScriptSource", params.scriptId, msg.message)
                    else 
                        console.log("getScriptSource", msg)
                })
            })

        }
    });

    chrome.Debugger.enable(function() {
        console.log("Debugger enabled")
    });
});